1 | #include <dirent.h> |
2 | #include <fcntl.h> |
3 | #include <stdbool.h> |
4 | #include <stdio.h> |
5 | #include <stdlib.h> |
6 | #include <string.h> |
7 | #include <unistd.h> |
8 | |
9 | |
10 | static void prepare (void); |
11 | #define PREPARE(argc, argv) prepare () |
12 | |
13 | static int do_test (void); |
14 | #define TEST_FUNCTION do_test () |
15 | |
16 | #include "../test-skeleton.c" |
17 | |
18 | static int dir_fd; |
19 | |
20 | static void |
21 | prepare (void) |
22 | { |
23 | size_t test_dir_len = strlen (test_dir); |
24 | static const char dir_name[] = "/tst-unlinkat.XXXXXX" ; |
25 | |
26 | size_t dirbuflen = test_dir_len + sizeof (dir_name); |
27 | char *dirbuf = malloc (size: dirbuflen); |
28 | if (dirbuf == NULL) |
29 | { |
30 | puts (s: "out of memory" ); |
31 | exit (1); |
32 | } |
33 | |
34 | snprintf (s: dirbuf, maxlen: dirbuflen, format: "%s%s" , test_dir, dir_name); |
35 | if (mkdtemp (template: dirbuf) == NULL) |
36 | { |
37 | puts (s: "cannot create temporary directory" ); |
38 | exit (1); |
39 | } |
40 | |
41 | add_temp_file (name: dirbuf); |
42 | |
43 | dir_fd = open (file: dirbuf, O_RDONLY | O_DIRECTORY); |
44 | if (dir_fd == -1) |
45 | { |
46 | puts (s: "cannot open directory" ); |
47 | exit (1); |
48 | } |
49 | } |
50 | |
51 | |
52 | static int |
53 | do_test (void) |
54 | { |
55 | /* fdopendir takes over the descriptor, make a copy. */ |
56 | int dupfd = dup (fd: dir_fd); |
57 | if (dupfd == -1) |
58 | { |
59 | puts (s: "dup failed" ); |
60 | return 1; |
61 | } |
62 | if (lseek (fd: dupfd, offset: 0, SEEK_SET) != 0) |
63 | { |
64 | puts (s: "1st lseek failed" ); |
65 | return 1; |
66 | } |
67 | |
68 | /* The directory should be empty safe the . and .. files. */ |
69 | DIR *dir = fdopendir (fd: dupfd); |
70 | if (dir == NULL) |
71 | { |
72 | puts (s: "fdopendir failed" ); |
73 | return 1; |
74 | } |
75 | struct dirent64 *d; |
76 | while ((d = readdir64 (dirp: dir)) != NULL) |
77 | if (strcmp (d->d_name, "." ) != 0 && strcmp (d->d_name, ".." ) != 0) |
78 | { |
79 | printf (format: "temp directory contains file \"%s\"\n" , d->d_name); |
80 | return 1; |
81 | } |
82 | closedir (dirp: dir); |
83 | |
84 | /* Try to create a file. */ |
85 | int fd = openat (fd: dir_fd, file: "some-file" , O_CREAT|O_RDWR|O_EXCL, 0666); |
86 | if (fd == -1) |
87 | { |
88 | if (errno == ENOSYS) |
89 | { |
90 | puts (s: "*at functions not supported" ); |
91 | return 0; |
92 | } |
93 | |
94 | puts (s: "file creation failed" ); |
95 | return 1; |
96 | } |
97 | write (fd, "hello" , 5); |
98 | close (fd: fd); |
99 | puts (s: "file created" ); |
100 | |
101 | /* fdopendir takes over the descriptor, make a copy. */ |
102 | dupfd = dup (fd: dir_fd); |
103 | if (dupfd == -1) |
104 | { |
105 | puts (s: "2nd dup failed" ); |
106 | return 1; |
107 | } |
108 | if (lseek (fd: dupfd, offset: 0, SEEK_SET) != 0) |
109 | { |
110 | puts (s: "2nd lseek failed" ); |
111 | return 1; |
112 | } |
113 | |
114 | /* The directory should be empty safe the . and .. files. */ |
115 | dir = fdopendir (fd: dupfd); |
116 | if (dir == NULL) |
117 | { |
118 | puts (s: "2nd fdopendir failed" ); |
119 | return 1; |
120 | } |
121 | bool seen_file = false; |
122 | while ((d = readdir64 (dirp: dir)) != NULL) |
123 | if (strcmp (d->d_name, "." ) != 0 && strcmp (d->d_name, ".." ) != 0) |
124 | { |
125 | if (strcmp (d->d_name, "some-file" ) != 0) |
126 | { |
127 | printf (format: "temp directory contains file \"%s\"\n" , d->d_name); |
128 | return 1; |
129 | } |
130 | |
131 | seen_file = true; |
132 | } |
133 | closedir (dirp: dir); |
134 | |
135 | if (!seen_file) |
136 | { |
137 | puts (s: "file not created in correct directory" ); |
138 | return 1; |
139 | } |
140 | |
141 | /* Remove the file now. */ |
142 | if (unlinkat (fd: dir_fd, name: "some-file" , flag: 0) != 0) |
143 | { |
144 | puts (s: "unlinkat failed" ); |
145 | return 1; |
146 | } |
147 | |
148 | /* We won't need dir_fd anymore after this, so use it. */ |
149 | if (lseek (fd: dir_fd, offset: 0, SEEK_SET) != 0) |
150 | { |
151 | puts (s: "3rd lseek failed" ); |
152 | return 1; |
153 | } |
154 | |
155 | /* The directory should be empty safe the . and .. files. */ |
156 | dir = fdopendir (fd: dir_fd); |
157 | if (dir == NULL) |
158 | { |
159 | puts (s: "3rd fdopendir failed" ); |
160 | return 1; |
161 | } |
162 | while ((d = readdir64 (dirp: dir)) != NULL) |
163 | if (strcmp (d->d_name, "." ) != 0 && strcmp (d->d_name, ".." ) != 0) |
164 | { |
165 | if (strcmp (d->d_name, "some-file" ) == 0) |
166 | { |
167 | puts (s: "some-file not removed" ); |
168 | return 1; |
169 | } |
170 | else |
171 | { |
172 | printf (format: "temp directory contains file \"%s\"\n" , d->d_name); |
173 | return 1; |
174 | } |
175 | } |
176 | closedir (dirp: dir); |
177 | |
178 | return 0; |
179 | } |
180 | |